/****************************************************************************
 *
 * Copyright 2016 Samsung Electronics All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific
 * language governing permissions and limitations under the License.
 *
 ****************************************************************************/
/****************************************************************************
 * libc/lib_internal.h
 *
 *   Copyright (C) 2007-2014 Gregory Nutt. All rights reserved.
 *   Author: Gregory Nutt <gnutt@nuttx.org>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name NuttX nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 ****************************************************************************/

#ifndef __LIBC_LIB_INTERNAL_H
#define __LIBC_LIB_INTERNAL_H

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <tinyara/config.h>

#include <sys/types.h>
#include <stdbool.h>
#include <stdio.h>
#include <limits.h>
#include <semaphore.h>

#include <tinyara/streams.h>

/****************************************************************************
 * Pre-processor Definitions
 ****************************************************************************/
/* This configuration directory is used in environment variable processing
 * when we need to reference the user's home directory.  There are no user
 * directories in TinyAra so, by default, this always refers to the root
 * directory.
 */

#ifndef CONFIG_LIB_HOMEDIR
#define CONFIG_LIB_HOMEDIR "/"
#endif

/* If C std I/O buffering is not supported, then we don't need its semaphore
 * protection.
 */

#if CONFIG_STDIO_BUFFER_SIZE <= 0
#define lib_sem_initialize(s)
#define lib_take_semaphore(s)
#define lib_give_semaphore(s)
#endif

/* The TinyAra C library an be build in two modes: (1) as a standard, C-library
 * that can be used by normal, user-space applications, or (2) as a special,
 * kernel-mode C-library only used within the OS.  If TinyAra is not being
 * built as separated kernel- and user-space modules, then only the first
 * mode is supported.
 */

#if (defined(CONFIG_BUILD_PROTECTED) && defined(__KERNEL__)) || \
	 defined(CONFIG_BUILD_KERNEL)
#include <tinyara/kmalloc.h>

/* Domain-specific allocations */

#define lib_malloc(s)      kmm_malloc(s)
#define lib_calloc(p, s)   kmm_calloc(p, s)
#define lib_zalloc(s)      kmm_zalloc(s)
#define lib_realloc(p, s)  kmm_realloc(p, s)
#define lib_memalign(p, s) kmm_memalign(p, s)
#define lib_free(p)        kmm_free(p)

/* User-accessible allocations */

#define lib_umalloc(s)     kumm_malloc(s)
#define lib_uzalloc(s)     kumm_zalloc(s)
#define lib_urealloc(p, s) kumm_realloc(p, s)
#define lib_ufree(p)       kumm_free(p)

#else
#include <stdlib.h>

/* Domain-specific allocations */

#define lib_malloc(s)      malloc(s)
#define lib_calloc(p, s)   calloc(p, s)
#define lib_zalloc(s)      zalloc(s)
#define lib_realloc(p, s)  realloc(p, s)
#define lib_free(p)        free(p)

/* User-accessible allocations */

#define lib_umalloc(s)     malloc(s)
#define lib_uzalloc(s)     zalloc(s)
#define lib_urealloc(p, s) realloc(p, s)
#define lib_ufree(p)       free(p)

#endif

#define LIB_BUFLEN_UNKNOWN INT_MAX

/****************************************************************************
 * Public Types
 ****************************************************************************/

/****************************************************************************
 * Public Data
 ****************************************************************************/

#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C" {
#else
#define EXTERN extern
#endif

/****************************************************************************
 * Public Function Prototypes
 ****************************************************************************/

/* Defined in lib_streamsem.c */

#if CONFIG_NFILE_STREAMS > 0
void stream_semtake(FAR struct streamlist *list);
void stream_semgive(FAR struct streamlist *list);
#endif

/* Defined in lib_dtoa.c */

#ifdef CONFIG_LIBC_FLOATINGPOINT
char *__dtoa(double d, int mode, int ndigits, int *decpt, int *sign, char **rve);
#endif

/* Defined in lib_fopen.c */

int lib_mode2oflags(FAR const char *mode);

/* Defined in lib_libwrite.c */

ssize_t lib_fwrite(FAR const void *ptr, size_t count, FAR FILE *stream);

/* Defined in lib_libfread.c */

ssize_t lib_fread(FAR void *ptr, size_t count, FAR FILE *stream);

/* Defined in lib_libfgets.c */

FAR char *lib_fgets(FAR char *buf, size_t buflen, FILE *stream, bool keepnl, bool consume);

/* Defined in lib_libfflush.c */

ssize_t lib_fflush(FAR FILE *stream, bool bforce);

/* Defined in lib_rdflush.c */

int lib_rdflush(FAR FILE *stream);

/* Defined in lib_wrflush.c */

int lib_wrflush(FAR FILE *stream);

/* Defined in lib_sem.c */

#if CONFIG_STDIO_BUFFER_SIZE > 0
void lib_sem_initialize(FAR struct file_struct *stream);
void lib_take_semaphore(FAR struct file_struct *stream);
void lib_give_semaphore(FAR struct file_struct *stream);
#endif

/* Defined in lib_libgetbase.c */

int lib_getbase(const char *nptr, const char **endptr);

/* Defined in lib_skipspace.c */

void lib_skipspace(const char **pptr);

/* Defined in lib_isbasedigit.c */

bool lib_isbasedigit(int ch, int base, int *value);

/* Defined in lib_checkbase.c */

int lib_checkbase(int base, const char **pptr);

/* Defined in lib_expi.c */

#ifdef CONFIG_LIBM
double lib_expi(size_t n);
#endif

/* Defined in lib_libsqrtapprox.c */

#ifdef CONFIG_LIBM
float lib_sqrtapprox(float x);
#endif

/* Defined in __randname.c */

char *__randname(char *template, uint8_t len);

#undef EXTERN
#if defined(__cplusplus)
}
#endif

#endif							/* __LIBC_LIB_INTERNAL_H */
